运用扫描电镜、金相显微镜、电子背散射衍射仪研究了电镀锌钢板表面白色线状缺陷产生的原因及形成机理。研究结果表明:白色线状缺陷位置有大量的夹渣,夹渣成分主要为O、Mg、Si、Ca、Al等元素,来自于热轧氧化铁皮的压入和连铸夹渣,同时缺陷处存在高斯织构,影响了电镀锌层晶粒的取向,导致电镀锌表面产生白色线状缺陷。 The causes and formation mechanism of white linear defects on the surface of electro - galvanized steel were studied by SEM, optical microscope and electron backscatter diffractometer. The results show that there are a lot of slag inclusions at the position of white linear defects, and the main components of slag inclusions are O, Mg, Si, Ca, Al and other elements, which are from the pressing and continuous casting slag inclusions of hot- The presence of Gaussian texture affects the orientation of the grains of the electrogalvanized layer, resulting in a white linear defect on the electrogalvanized surface.